package com.itheima.reggie.controller;

import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import java.util.UUID;

@RestController
@RequestMapping("/common")
@Slf4j
public class CommonController {
    @Value("${reggie.path}")
    private String basePath;

    /**
     * 上传文件
     * @param file
     * @return
     */
    @PostMapping("/upload")
    public R<String> upload(MultipartFile file) {
        log.info(file.toString());

        String originalFilename = file.getOriginalFilename();
        String substring = originalFilename.substring(originalFilename.lastIndexOf("."));

        //uuid加密
        String fileName = UUID.randomUUID().toString() + substring;
        //创建多级文件夹
        File dir=new File(basePath);
        if (!dir.exists()){
            dir.mkdirs();
        }

        try {
            file.transferTo(new File(basePath + fileName));
        } catch (IOException e) {
            e.printStackTrace();
        }

        return R.success(fileName);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){
        try {
            FileInputStream fileInputStream=new FileInputStream(new File(basePath+name));
            //1.服务器输出给浏览器直接展现
            //2.服务器输出给浏览器附件下载【下载文件的时候才需要】,如下
            response.setHeader("content-disposition","attachment;filename="+name);
            //content-disposition,设置文件下载操作
            //attachment,附件下载
            IOUtils.copy(fileInputStream,response.getOutputStream());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
